Yarn bobbin or tube, particularly for use in looms



Patented June 2, 1936 UNITED STATES PATENT OFFICE YARN BOBBIN OR "TUBE, PARTICULARLY FOR USE IN LOOMS 6 Claims.

This invention relates to a yarn bobbin or tube, particularly for use in looms.

Bobbins of this class are frequently made of paper, have a slightly conical shape and are provided at their lower larger end with a metal contact sleeve and a thickened head, both of which are held together by a closing-in shell which has a projecting edge on which the bobbin is held by means of claw ends of the shuttle. When the yarn has been unwound from the bobbin, an electric feeler as provided in automatic looms makes contact with the metal contact sleeve and the empty bobbin is replaced by a full one by means of a special device.

It is not difiicult to secure the metal contact sleeve to the bobbin, but it has not been possible hitherto to attach the thickened head and the closing shell to the metal sleeve in such a way that the head will resist even considerable shocks during weaving.

It has been proposed to establish a firm connection by providing the metal contact sleeve with an outward curl and beading on the latter the shell enclosing the lower portion of the sleeve and the thickened head. This construction is, however, not satisfactory, since the closing shell is supported only by the weak curled edge of the thin-walled metal contact sleeve, so that when the thickened head is gradually loosened by shocks the closing shell turns down the curled edge of the sleeve and the head together with the closing shell are torn ofi from the bobbin.

The invention eliminates these defects by clamping on the thin-walled metal contact sleeve above the thickened head a second heavy-walled short metal sleeve or shell having an outwardly curled lower end and heading onto the curl of the second sleeve an enclosing shell surrounding the thickened head and the end of the bobbin. The metal contact sleeve extends to the lower end of the bobbin, so that the curl thereof is flush with the lower end of the bobbin and the thickening of the head rests between the curl of the metal contact sleeve and the curl of the second reinforced metal sleeve. The closing shell surrounds the lower end of the bobbin and the curls of the first and second sleeves enclosing the thickened head.

As the second metal sleeve provided on the first has only a short length, it can be provided with thicker walls than the long first sleeve and is therefore irremovably clamped onto the latter.

When in a bobbin of this kind the nippers in the shuttle press against the head from above, the

head cannot be pushed down from the bobbin, as the upper short and thick-walled metal sleeve is immovably connected with the metal contact sleeve and thus with the core of the bobbin. The sleeves are preferably still more firmly attached to the part carrying them by a plurality of indentations or marks produced by a center punch, though this additional precaution is not absolutely necessary. The curl engaged by the nippers cannot yield owing to the particularly thick walls of the second metal sleeve. The bobbin may be made of any suitable material, but the invention relates preferably to thick-walled paper tubes having a thick boldly projecting hard paper head.

By way of example, the invention is illustrated in the accompanying drawing, in which Figure 1 shows, partly in section, a bobbin according to the prior art; and Fig. 2, also partly in section, a bobbin according to the invention.

Referring to the drawing, the bobbin a of known type possesses at its lower end a thickened head I) up to which extends the metal contact sleeve 0 provided at its lower end with a curl c resting on the head I). The lower portion of the bobbin a, the thickened head I), and the curl c of the metal contact sleeve 0 are surrounded by the closing shell (I.

The bobbin a according to the invention has also a thickened head b, but this thickened member is arranged on the metal contact sleeve 0 which with its curl c is flush with the lower end of the bobbin 11. Above the thickened head I) the thin-walled metal contact sleeve 0 carries a second thick-walled metal sleeve e shorter than the first, whose curl e rests on the head I). The lower portion of the bobbin a and the sleeve curls c and e enclosing the thickened head I) are embraced by the closing shell :2 which at cl is beaded on the curl e of the second short metal sleeve e. The nippers of the shuttle engage at d. The indentations are designated 1.

I claim:---

1. A bobbin comprising a slightly conical member having a thickened head at its lower end, a thin-walled metal contact sleeve disposed on said member and provided at its lower end with an outward curl, a second thick-walled metal sleeve clamped onto said first sleeve above said head and having an outwardly curled lower end, and a closing shell beaded upon the curl of said second sleeve and surrounding the thickened head and the end of the conical member.

2. A bobbin according to claim 1, wherein the end of the first sleeve is flush with the lower end clamped on the first-mentioned sleeve and having an outward curl spaced from the curl of the first-mentioned sleeve, and a closing shell clamped around both curls and extending around the end of the conical member.

5. A bobbin comprising a slightly conical member, a metal sleeve disposed in contact with the wider end of the conical member and having an extended portion at the end of the bobbin, a

second metal sleeve around the first-mentioned sleeve and having an extended portion spaced from the extended portion of the first-mentioned sleeve, and means extending around both extended portions and around the end of the conical member.

6. A bobbin according to claim 5, in which the means is in the form of a metallic closing shell in contact with the extended portions of the sleeves.

FRITZ FALLSCHEER. 

